I know the OP says that on his bike they blocked off the stepper, but I did not see where that was done to your bike, JJC1957.
As mentioned, your issue is not that weird. With no drag on the motor the idle is too high. With the slight drag from letting out the clutch (even in neutral there is drag with the clutch out) the idle drops to where it should be.
First thing to check is the stepper motor. If that is not it the next thing I would look for is an air leak. And the third thing would be the throttle plates (sacred screw) may have been messed with and is now the throttle plates are too far open.
It is just a motor. It works under the same principles as any other motor, even though it is a Moto Guzzi.
As mentioned, your issue is not that weird. With no drag on the motor the idle is too high. With the slight drag from letting out the clutch (even in neutral there is drag with the clutch out) the idle drops to where it should be.
First thing to check is the stepper motor. If that is not it the next thing I would look for is an air leak. And the third thing would be the throttle plates (sacred screw) may have been messed with and is now the throttle plates are too far open.
It is just a motor. It works under the same principles as any other motor, even though it is a Moto Guzzi.